High-ductility aluminium alloy part cast under pressure
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United States of America Patent
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Issued Date -
Jul 21, 2005
app pub date -
Nov 30, 2004
filing date -
Jul 10, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A safety or structural part cast under pressure made of high-ductility aluminum alloy containing, by weight: Si 2-6%; Mg<0.40%; Cu<0.30%; Zn<0.30%; Fe<0.50%; Ti<0.30%, at least one element for reducing adherence to the mold such as Mn (0.3-2%), Cr (0.1-0.3%), Co (0.1-0.3%), V (0.1-0.3%) or Mo (0.1-0.4%), and at least one element for modifying eutectics, such as Sr (50-500 ppm), Na (20-100 ppm) or Ca (30-120 ppm). Other elements may be present in an amount <0.05 each and <0.10 in total, the balance being aluminum. The part exhibits, after T5 tempering at a temperature less than 220.degree. C., a yield strength R.sub.p0.2>110 MPa and an elongation A>10%.
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